SedWeather: A web application framework to visualize Chemical Weathering of Clastic Sediments

Flowchart

  • Packages install and import
  • Data import
  • Weathering Indices (WIs) calculation and Compositional Space Diagrams design
  • Data statistics - boxplots, scatter matrix, correlation matrix, correlation diagrams
  • SedWeathering layout design

Packages installation

Packages import

Data loading

Data (composite) details:

Sample Name/ID Sample Category/Subcategory Reference
UCC-1 Upper Continental Crust Shaw et al., 1967, 1976, 1986
UCC-2 Upper Continental Crust Fahrig and Eade, 1968; Eade and Fahrig, 1973
UCC-3 Upper Continental Crust Ronov and Yaroshevskiy, 1976
UCC-4 Upper Continental Crust Gao et al., 1998
UCC-5 Upper Continental Crust Taylor and McLennan, 1985, 1995
UCC-6 Upper Continental Crust Wedepohl, 1995
UCC-7 Upper Continental Crust Rudnick and Gao, 2003
UCC-8 Upper Continental Crust Togashi et al., 2000
Dunite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Harzburgite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Peridotite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Lherzolite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Anorthosite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Gabbro Igneous Composite Hyndman, 1985; Le Maitre, 1976
Basalt Igneous Composite Hyndman, 1985; Le Maitre, 1976
Tholeiite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Andesite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Dacite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Tonalite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Diorite and Granodiorite quartz diorite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Granodiorite and quartz monzodiorite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Rhyolite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Granite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Trachyte Igneous Composite Hyndman, 1985; Le Maitre, 1976
Syenite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Nepheline syenite Igneous Composite Hyndman, 1985; Le Maitre, 1976
Phonolite Igneous Composite Hyndman, 1985; Le Maitre, 1976
NASC Shale Composite McLennan et al., 1983; McLennan, 2009; Gromet et al., 1984
PAAS Shale Composite Taylor and McLennan, 1985; Barth et al., 2000; Haskin and Haskin, 1966; McLennan, 2009; Nance and Taylor, 1976; McLennan, 1981, 1989
shale Shale Composite Mason, 1982
Amazon Suspended Sediment McLennan, 1993
Colorado Suspended Sediment McLennan, 1993
Columbia Suspended Sediment McLennan, 1993
Congo (Zaire) Suspended Sediment McLennan, 1993
Danube Suspended Sediment McLennan, 1993
Gangess/Brahmaputra Suspended Sediment McLennan, 1993
Huanghe Suspended Sediment McLennan, 1993
Indus Suspended Sediment McLennan, 1993
Mackenzie Suspended Sediment McLennan, 1993
Mekong Suspended Sediment McLennan, 1993
Mississippi Suspended Sediment McLennan, 1993
Niger Suspended Sediment McLennan, 1993
Nile Suspended Sediment McLennan, 1993
Orinoco Suspended Sediment McLennan, 1993
Parana Suspended Sediment McLennan, 1993
St. Lawrence Suspended Sediment McLennan, 1993
Western Europe Denudation Region McLennan, 1993
Alpine Europe Denudation Region McLennan, 1993
Central America (incl. Mexico) Denudation Region McLennan, 1993
Northwest South America Denudation Region McLennan, 1993
Ocean Islands (excl. New Zealand) Denudation Region McLennan, 1993
New Zealand (South Island) Denudation Region McLennan, 1993
U.S. Atlantic Coast Denudation Region McLennan, 1993

Acronym used:

Data (case study) details:

Weathering Indices (WIs) calculation and Compositional Space Diagrams

Molar calculation

CaO* calculation

Chemical Indices calculation

Weathering Indices (WIs) formulae used:

Chemical Index of Weathering (CIW) after Harnois, 1988:

$ CIW = 100 * \frac {Al_2O_3} {Al_2O_3 + CaO* + Na_2O} $

Chemical Proxy of Alteration (CPA) after Buggle et al., 2011:

$ CPA = 100 * \frac {Al_2O_3} {Al_2O_3 + Na_2O} $

Chemical Index of Alteration (CIA) after Nesbitt and Young, 1982:

$ CIA = 100 * \frac {Al_2O_3} {Al_2O_3 + CaO* + Na_2O + K_2O} $

Plagioclase Index of Alteration (PIA) after Fedo et al., 1995:

$ PIA = 100 * \frac {Al_2O_3 - K_2O} {Al_2O_3 + CaO* + Na_2O - K_2O} $

Modified Chemical Index of Alteration (CIX) after Garzanti et al., 2014:

$ CIX = 100 * \frac {Al_2O_3} {Al_2O_3 + Na_2O + K_2O} $

Index of Compositional Variability (ICV) after Cox et al., 1995:

$ ICV = \frac {Fe_2O_3 + K_2O + Na_2O + CaO + MgO + MnO + TiO_2} {Al_2O_3} $

Weathering Index of Parker (WIP) after Parker, 1970:

$ WIP = 100 * (\frac {2Na_2O} {0.35} + \frac {MgO} {0.9} + \frac {2K_2O} {0.25}+ \frac {CaO*} {0.7} ) $

Compositional space diagrams

A - CN - K compositional space diagram after Nesbitt and Young, 1982

M - F - W compositional space diagramm after Ohta and Arai, 2007

A - CNK - FM compositional space diagram after Nesbitt and Young, 1989

Data slicing

user-defined subcategory and subsubcategory plots

Ratios

Data statistics

Dropping extra variable and subsetting data

Boxplots

Scatter matrix

Correlation matrix

Visual representation of correlation matrix of subcategories

Correlation diagrams

SedWeathering layout design